JPWO2020090387A1 - Communication device and control device - Google Patents

Abstract

An acquisition unit (241) that acquires information for operating as a master for controlling side link communication between other devices from the base station apparatus (100), and the master based on the information acquired by the acquisition unit. A communication device (200) is provided that includes a control unit (240) that executes a process for operating the device.

Description

The present disclosure relates to communication devices and control devices.

In recent years, expectations for in-vehicle communication (V2X communication) have been increasing for the realization of autonomous driving in the future. V2X communication is an abbreviation for Vehicle to X communication, and is a system in which "something" communicates with a car. Examples of "something" here include vehicles, infrastructure, networks, pedestrians, etc. (V2V, V2I, V2N, and V2P). For example, Patent Document 1 discloses an example of a technique related to V2X communication.

In addition, as wireless communication for automobiles, the development of DSRC (Dedicated Short Range Communication) based on 802.11p has been mainly promoted, but in recent years, LTE-based in-vehicle communication "LTE-" has been promoted. The standardization of "based V2X" has been carried out. In LTE-based V2X communication, the exchange of basic safety messages and the like is supported.

Japanese Unexamined Patent Publication No. 2017-2087996

On the other hand, NR V2X communication using NR (New Radio) requires high reliability and latency, and the conventional V2X communication method cannot meet the requirements for high reliability and latency.

Therefore, the present disclosure proposes a new and improved communication device and control device capable of efficiently performing V2X communication in NR V2X communication.

According to the present disclosure, an acquisition unit that acquires information for operating as a master for controlling side link communication between other devices from a base station apparatus, and the master based on the information acquired by the acquisition unit. A communication device is provided that includes a control unit that executes a process for operating the device.

Further, according to the present disclosure, a control unit that sets information for the communication device to operate as a master for controlling side link communication between other devices, and information set by the control unit are used for the communication device. A control device is provided that includes a communication unit that transmits to the communication device to operate as the master.

Further, according to the present disclosure, an acquisition unit that acquires information on the side link communication from a communication device that operates as a master for controlling side link communication with another device, and an acquisition unit based on the information acquired by the acquisition unit. A communication device including a control unit that executes processing related to the side link communication is provided.

It is explanatory drawing for demonstrating an example of the schematic structure of the system which concerns on one Embodiment of this disclosure. It is a block diagram which shows an example of the structure of the base station which concerns on this embodiment. It is a block diagram which shows an example of the structure of the terminal apparatus which concerns on this embodiment. It is a figure which showed the outline of V2X communication. It is explanatory drawing for demonstrating an example of the whole image of V2X communication. It is a figure which showed an example of the use case of V2X communication. It is explanatory drawing for demonstrating an example of a V2X operation scenario. It is explanatory drawing for demonstrating an example of a V2X operation scenario. It is explanatory drawing for demonstrating an example of a V2X operation scenario. It is explanatory drawing for demonstrating an example of a V2X operation scenario. It is explanatory drawing for demonstrating an example of a V2X operation scenario. It is explanatory drawing for demonstrating an example of a V2X operation scenario. It is a figure which showed an example of the configuration of the resource allocated to the side link communication. It is explanatory drawing for demonstrating an example of the operation timeline when a terminal apparatus transmits a packet based on Mode4 resource allocation. It is explanatory drawing which shows the sensing operation in LTE V2X. It is a flow chart which shows the outline of the control of the side link V2V communication between the transmitter and the receiver which concerns on embodiment of this disclosure. It is a flow chart which shows the outline of the control of the side link V2V communication between the transmitter and the receiver which concerns on embodiment of this disclosure. It is a flow chart which shows the outline of the control of the side link V2V communication between the transmitter and the receiver which concerns on embodiment of this disclosure. It is a flow chart which shows the outline of the control of the side link V2V communication between the transmitter and the receiver which concerns on embodiment of this disclosure. It is a flow chart which shows the outline of the control of the side link V2V communication between the transmitter and the receiver which concerns on embodiment of this disclosure. It is a block diagram which shows 1st example of the schematic structure of eNB. It is a block diagram which shows the 2nd example of the schematic structure of eNB. It is a block diagram which shows an example of the schematic structure of a smartphone. It is a block diagram which shows an example of the schematic structure of a car navigation device.

Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

The explanations will be given in the following order.
1. 1. Configuration example 1.1. An example of system configuration 1.2. Base station configuration example 1.3. Configuration example of terminal device 2. V2X communication 3. Allocation method of resources to side links 4. Control of side link V2V communication between sender and receiver 5. Application example 5.1. Application examples related to base stations 5.2. Application examples related to terminal devices 6. summary

<< 1. Configuration example >>
<1.1. Example of system configuration>
First, with reference to FIG. 1, an example of a schematic configuration of the system 1 according to the embodiment of the present disclosure will be described. FIG. 1 is an explanatory diagram for explaining an example of a schematic configuration of the system 1 according to the embodiment of the present disclosure.

As shown in FIG. 1, the system 1 includes a wireless communication device 100 and a terminal device 200. Here, the terminal device 200 is also referred to as a user. The user may also be referred to as a UE. The wireless communication device 100C is also called a UE-Relay. The UE here may be a UE defined in LTE or LTE-A, and the UE-Relay may be a Prose UE to Network Relay discussed in 3GPP, and more generally communicate. It may mean a device.

(1) Wireless communication device 100
The wireless communication device 100 is a device that provides a wireless communication service to a subordinate device. For example, the wireless communication device 100A is a base station of a cellular system (or mobile communication system). The base station 100A performs wireless communication with a device (for example, a terminal device 200A) located inside the cell 10A of the base station 100A. For example, the base station 100A transmits a downlink signal to the terminal device 200A and receives an uplink signal from the terminal device 200A.

The base station 100A is logically connected to another base station by, for example, an X2 interface, and can transmit and receive control information and the like. Further, the base station 100A is logically connected to a so-called core network (not shown) by, for example, an S1 interface, and can transmit and receive control information and the like. Communication between these devices can be physically relayed by various devices.

Here, the wireless communication device 100A shown in FIG. 1 is a macro cell base station, and cell 10A is a macro cell. On the other hand, the wireless communication devices 100B and 100C are master devices that operate the small cells 10B and 10C, respectively. As an example, the master device 100B is a small cell base station that is fixedly installed. The small cell base station 100B establishes a wireless backhaul link with the macro cell base station 100A and an access link with one or more terminal devices (for example, the terminal device 200B) in the small cell 10B. The wireless communication device 100B may be a relay node defined by 3GPP. The master device 100C is a dynamic AP (access point). The dynamic AP100C is a mobile device that dynamically operates the small cell 10C. The dynamic AP100C establishes a wireless backhaul link with the macrocell base station 100A and an access link with one or more terminal devices (eg, terminal device 200C) in the small cell 10C. The dynamic AP100C may be, for example, a terminal device equipped with hardware or software capable of operating as a base station or a wireless access point. The small cell 10C in this case is a dynamically formed localized network (Localized Network / Virtual Cell).

Cell 10A is an arbitrary wireless communication system such as LTE, LTE-A (LTE-Advanced), LTE-ADVANCED PRO, GSM®, UMTS, W-CDMA, CDMA2000, WiMAX, WiMAX2 or 802.16. It may be operated according to.

The small cell is a concept that can include various types of cells smaller than the macro cell (for example, femtocell, nanocell, picocell, microcell, etc.) that are arranged so as to overlap or do not overlap with the macrocell. In one example, the small cell is operated by a dedicated base station. In another example, the small cell is operated by the terminal serving as a master device temporarily operating as a small cell base station. So-called relay nodes can also be considered as a form of small cell base station. A wireless communication device that functions as a master station of a relay node is also called a donor base station. The donor base station may mean DeNB in LTE, or more generally the master station of the relay node.

(2) Terminal device 200
The terminal device 200 can communicate in a cellular system (or mobile communication system). The terminal device 200 performs wireless communication with a wireless communication device of the cellular system (for example, base station 100A, master device 100B or 100C). For example, the terminal device 200A receives the downlink signal from the base station 100A and transmits the uplink signal to the base station 100A.

Further, the terminal device 200 is not limited to the so-called UE, and for example, a so-called low cost terminal (Low cost UE) such as an MTC terminal, an eMTC (Enhanced MTC) terminal, and an NB-IoT terminal may be applied. .. Further, an infrastructure terminal such as an RSU (Road Side Unit) or a terminal such as a CPE (Customer Premises Equipment) may be applied.

(3) Supplement Although the schematic configuration of the system 1 has been shown above, the present technology is not limited to the example shown in FIG. For example, as the configuration of the system 1, a configuration that does not include a master device, SCE (Small Cell Enhancement), HetNet (Heterogeneous Network), an MTC network, or the like can be adopted. Further, as another example of the configuration of the system 1, the master device may be connected to the small cell and the cell may be constructed under the small cell.

<1.2. Base station configuration example>
Next, the configuration of the base station 100 according to the embodiment of the present disclosure will be described with reference to FIG. FIG. 2 is a block diagram showing an example of the configuration of the base station 100 according to the embodiment of the present disclosure. Referring to FIG. 2, the base station 100 includes an antenna unit 110, a wireless communication unit 120, a network communication unit 130, a storage unit 140, and a control unit 150.

(1) Antenna unit 110
The antenna unit 110 radiates the signal output by the wireless communication unit 120 into space as a radio wave. Further, the antenna unit 110 converts a radio wave in space into a signal and outputs the signal to the wireless communication unit 120.

(2) Wireless communication unit 120
The wireless communication unit 120 transmits and receives signals. For example, the wireless communication unit 120 transmits a downlink signal to the terminal device and receives an uplink signal from the terminal device.

(3) Network communication unit 130
The network communication unit 130 transmits / receives information. For example, the network communication unit 130 transmits information to another node and receives information from the other node. For example, the other nodes include other base stations and core network nodes.

As described above, in the system 1 according to the present embodiment, the terminal device may operate as a relay terminal and relay the communication between the remote terminal and the base station. In such a case, for example, the wireless communication device 100C corresponding to the relay terminal may not include the network communication unit 130.

(4) Storage unit 140
The storage unit 140 temporarily or permanently stores the program and various data for the operation of the base station 100.

(5) Control unit 150
The control unit 150 provides various functions of the base station 100. The control unit 150 includes a communication control unit 151, an information acquisition unit 153, and a notification unit 155. The control unit 150 may further include other components other than these components. That is, the control unit 150 can perform operations other than the operations of these components.

The communication control unit 151 executes various processes related to the control of wireless communication with the terminal device 200 via the wireless communication unit 120. In addition, the communication control unit 151 executes various processes related to the control of communication with other nodes (for example, other base stations, core network nodes, etc.) via the network communication unit 130.

The information acquisition unit 153 acquires various information from the terminal device 200 and other nodes. The acquired information may be used, for example, for control of wireless communication with a terminal device, control for cooperation with other nodes, and the like.

The notification unit 155 notifies the terminal device 200 and other nodes of various information. As a specific example, the notification unit 155 may notify the terminal device of various information for the terminal device in the cell to perform wireless communication with the base station. Further, as another example, the notification unit 155 may notify another node (for example, another base station) of the information acquired from the terminal device in the cell.

<1.3. Terminal device configuration example>
Next, an example of the configuration of the terminal device 200 according to the embodiment of the present disclosure will be described with reference to FIG. FIG. 3 is a block diagram showing an example of the configuration of the terminal device 200 according to the embodiment of the present disclosure. As shown in FIG. 3, the terminal device 200 includes an antenna unit 210, a wireless communication unit 220, a storage unit 230, and a control unit 240.

(1) Antenna unit 210
The antenna unit 210 radiates the signal output by the wireless communication unit 220 into space as a radio wave. Further, the antenna unit 210 converts a radio wave in space into a signal and outputs the signal to the wireless communication unit 220.

(2) Wireless communication unit 220
The wireless communication unit 220 transmits and receives signals. For example, the wireless communication unit 220 receives the downlink signal from the base station and transmits the uplink signal to the base station.

Further, in the system 1 according to the present embodiment, the terminal device 200 may directly communicate with another terminal device 200 without going through the base station 100. In this case, the wireless communication unit 220 may transmit and receive a side link signal to and from another terminal device 200.

(3) Storage unit 230
The storage unit 230 temporarily or permanently stores the program and various data for the operation of the terminal device 200.

(4) Control unit 240
The control unit 240 provides various functions of the terminal device 200. For example, the control unit 240 includes a communication control unit 241, an information acquisition unit 243, and a notification unit 247. The control unit 240 may further include other components other than these components. That is, the control unit 240 may perform operations other than the operations of these components.

The communication control unit 241 executes various processes related to the control of wireless communication with the base station 100 and other terminal devices 200 via the wireless communication unit 220. For example, the communication control unit 241 may reserve a resource to be used for transmitting a packet. Further, the communication control unit 241 may select a part of the reserved resources and control the packet to be transmitted using the selected resources.

Further, the communication control unit 241 may make a predetermined determination based on the information acquired from the base station 100 or another terminal device 200. As a more specific example, the communication control unit 241 may determine whether or not a packet can be transmitted to another terminal device 200. Further, at this time, the communication control unit 241 may determine whether or not to drop the packet to be transmitted to the other terminal device 200.

The information acquisition unit 243 acquires various information from the base station 100 and other terminal devices 200. As a specific example, the information acquisition unit 243 may acquire information about another terminal device 200 (for example, reception capability, etc.) from the other terminal device 200. In addition, the information acquisition unit 243 may acquire various information for selecting resources to be used for communication with the other terminal device 200 from the base station 100 or the other terminal device 200. As a more specific example, the information acquisition unit 243 may acquire information about resources reserved by the other terminal device 200 from the other terminal device 200.

The notification unit 247 notifies the base station 100 and other terminal devices 200 of various information. As a specific example, the notification unit 247 may notify another terminal device 200 (for example, the terminal device 200 to which the data or packet is transmitted) of information about the data or packet to be transmitted. In addition, the notification unit 247 may notify another terminal device 200 of information about a resource reserved for use in transmitting the packet.

<< 2. V2X communication >>
Subsequently, the outline of V2X communication will be described. V2X communication is an abbreviation for Vehicle to X communication, and is a system in which "something" communicates with a car. For example, FIG. 4 is a diagram showing an outline of V2X communication. Examples of "something" here include vehicles (Vehicle), equipment (Infrastructure), networks (Network), pedestrians (Pedestrian), and the like (V2V, V2I), as shown in FIG. , V2N, and V2P).

(Overview of V2X communication)
Further, FIG. 5 is an explanatory diagram for explaining an example of the overall image of V2X communication. In the example shown in FIG. 5, a V2X application server (APP server) is held as a cloud server, and the application server controls V2X communication on the core network side. The base station performs Uu-link communication with the terminal device, while performing communication control of direct communication such as V2V communication and V2P communication. In addition to the base station, an RSU (Road Side Unit) is arranged as a roadside infrastructure. There are two possible RSUs, a base station type RSU and a UE type RSU. In RSU, V2X application (V2X APP) is provided and support such as data relay is provided.

(V2X communication use case)
As wireless communication for automobiles, the development of DSRC (Dedicated Short Range Communication) based on 802.11p has been mainly promoted, but in recent years, LTE-based in-vehicle communication "LTE-based V2X" has been promoted. (LTE-based V2X communication) ”has been standardized. In LTE-based V2X communication, the exchange of basic safety messages and the like is supported. On the other hand, with the aim of further improving V2X communication, NR V2X communication using 5G technology (NR: New Radio) has been studied in recent years. For example, FIG. 6 is a diagram showing an example of a use case of V2X communication.

NR V2X communication supports new use cases that require high reliability, low latency, high speed communication, and high capacity, which were previously difficult to support with LTE-based V2X. As a specific example, among the examples shown in FIG. 6, for example, provision of a dynamic map, remote driving, and the like can be mentioned. In addition to this, there are sensor data sharing in which sensor data is exchanged between vehicles and road vehicles, and plateoning use cases for platooning. Use cases and requirements for such NR V2X communication are specified in 3GPP TR22.886. For reference, an outline of an example of a use case will be described below.

(1) Vehicles Platooning
This is a use case of platooning in which a plurality of vehicles form a platoon and travel in the same direction, and information is exchanged between the vehicle leading the platooning and another vehicle to control the platooning. By exchanging such information, for example, it becomes possible to further reduce the inter-vehicle distance of platooning.

(2) Extended Sensors
This is a use case in which sensor-related information (raw data before data processing and data after processing) can be exchanged between vehicles. Sensor information is collected through local sensors, live video images (eg, live video images between surrounding vehicles, RSUs, and pedestrians), V2X application servers, and the like. By exchanging these information, the vehicle can obtain information that cannot be obtained by its own sensor information, and can recognize / recognize a wider range of environments. In this use case, since it is necessary to exchange a lot of information, a high data rate is required for communication.

(3) Advanced Driving
This is a use case that enables semi-automatic driving and fully automatic driving. In this use case, the RSU shares the cognitive / recognition information obtained from its own sensors, etc. with the surrounding vehicles, so that each vehicle adjusts the track and operation in synchronization with other vehicles. Can be done. In addition, each vehicle can share the intention and intention of driving with neighboring vehicles.

(4) Remote Driving
This is a use case for remote control and V2X applications. Remote control is used when another person drives in place of a person who has difficulty driving, or when operating a vehicle in a dangerous area. For public transportation, for example, cloud computing-based maneuvers can be applied to public transportation where the route and the road to be traveled are fixed to some extent. In this use case, communication is required to have high reliability and low transmission delay.

(Physical layer enhancement)
Further enhancement of the physical layer from LTE V2X is required to achieve the above requirements. Target links include Uu links and PC5 links (side links). A Uu link is a link between an infrastructure such as a base station or RSU (Road Side Unit) and a terminal device. The PC5 link (side link) is a link between terminal devices. The main points of enhancement are shown below.

Examples of enhancements include:
・ Channel format ・ Side link feedback communication ・ Side link resource allocation method ・ Vehicle position information estimation technology ・ Terminal-to-terminal relay communication ・ Unicast communication, multicast communication support ・ Multicarrier communication, carrier aggregation ・ MIMO / beamforming ・ High frequency frequency support (Example: 6 GHz or higher)

Examples of the channel format include Flexible numerology, short TTI (Transmission Time Interval), multi-antenna support, and Waveform. Further, examples of the side link feedback communication include HARQ, CSI (Channel Status Information) and the like.

(V2X operation scenario)
An example of the V2X communication operation scenario will be described below. In V2N communication, only DL / UL communication between the base station and the terminal device was simple. On the other hand, in V2V communication, various communication paths can be considered. In the following, each scenario will be described mainly focusing on the example of V2V communication, but the same communication operation can be applied to V2P and V2I. In V2P and V2I, the communication destination is Pedestrian or RSU.

For example, FIGS. 7 to 12 are explanatory diagrams for explaining an example of a V2X operation scenario. Specifically, FIG. 7 shows a scenario in which vehicles directly communicate with each other without going through a base station (E-UTRAN). FIG. 8 shows a scenario in which vehicles communicate with each other via a base station. 9 and 10 show a scenario in which vehicles communicate with each other via a terminal device (UE, here RSU) and a base station. 11 and 12 show a scenario in which vehicles communicate with each other via a terminal device (UE, in this case RSU or another vehicle).

In addition, in FIGS. 7 to 12, the "side link" corresponds to a communication link between terminal devices and is also referred to as PC5. Specific examples of side links include V2V, V2P, and V2I communication links. The "Uu interface" corresponds to a wireless interface between a terminal device and a base station. A specific example of the Uu interface is a V2N communication link. The "PC5 interface" corresponds to a wireless interface between terminal devices.

<< 3. Side link resource allocation method >>
In this embodiment, the focus is on the resource allocation method of the V2V communication link in the NR V2X communication. LTE radio frames are used in LTE sidelink control channels (PSCCH: Physical Sidelink Control Channel) and data channels (PSSCH: Physical Sidelink Shared Channel). The NR V2X supports different service types, for example, it may perform both high-speed, high-capacity communication (eMBB) and low-latency, high-reliability (URLLC) communication for a single vehicle. In particular, when performing URLLC communication, if the LTE frame configuration is used, the requirement of ultra-latency may not be satisfied. Therefore, it is considered better to use the NR numerology and the frame configuration. That is, in NR V2X, it is desirable to use NR numerology and frame configuration for NR sidelinks so that different service requirements can be met.

On the other hand, if the NR numerology or frame configuration is applied to the side link, if it is different from the LTE frame configuration, it may not be able to be decoded by the LTE V2X sensing method, or the sensing result may be affected. When traffic with different frame configurations coexist, it cannot be sensed at the same time by the existing method. Further, when the LTE and NR vehicles coexist, the NR does not maintain backward compatibility, so that the vehicle communicating with LTE cannot read the transmission packet of the vehicle communicating with NR. This will affect the sensing results of the vehicle communicating in LTE.

Therefore, in this embodiment, NR V2X sensing capable of corresponding to NR numerology and frame configuration will be described.

first. The outline of the resource selection method for the side link in the LTE sensing result will be described.

For example, FIG. 13 is a diagram showing an example of the configuration of resources (resource pools) allocated to side-link communication, and shows an example of a case where frequency division multiplexing (FDM) is applied. .. As shown in FIG. 13, the resource pool is divided into an SA (Scheduling Assignment) area and a Data area, and PSCCH (Physical Sidelink Control Channel) and PSCH (Physical Sidelink Shared Channel) are transmitted by each area. In the following, the description will be focused on the case where FDM is applied as shown in FIG. 13, but the application destination of the technology according to the present disclosure is not necessarily limited. As a specific example, even when time division multiplexing (TDM) is applied, it is possible to apply the technique according to the present disclosure described below. When TDM is applied, the SA region and the Data region are orthogonal to each other on the time axis.

As the method of resource allocation to the side link, the method of "Mode 3 resource allocation" in which the base station allocates the resource of the side link and the method of "Mode 4 resource allocation" in which the terminal device itself senses and selects the resource of the side link. There is. When the terminal device selects a resource by itself, the terminal device randomly selects the resource or senses the past resource usage status, and then selects the resource based on the sensing result.

-Mode4 resource allocation The outline of Mode4 resource allocation will be described with reference to FIG. FIG. 14 is an explanatory diagram for explaining an example of an operation timeline when the terminal device transmits a packet based on the Mode4 resource allocation. As shown in FIG. 14, the terminal device that transmits a packet first performs sensing in order to discover a resource used for transmitting the packet from the resource pool. Next, the terminal device selects a resource from the resource pool based on the result of the sensing. Then, the terminal device transmits the packet using the selected resource. Further, at this time, the terminal device reserves a resource to be used for subsequent packet transmission, if necessary.

In LTE V2X, two sensing methods, SA decoding and Energy measurement, were supported as sensing. The terminal device performs these sensing at the same time and performs resource selection.

SA decoding is a sensing method that decodes the control channel transmitted from the terminal device. In the SA information, it will be possible to determine whether future resources are reserved. However, if the decoding of the SA signal fails, there is a demerit that the resource occupancy status of the data area cannot be known. Even if it is found that the terminal device is occupied by the SA signal, if the terminal device on the transmitting side is sufficiently far from the position of the terminal device on the receiving side, the power level in the data area may actually be below the permissible level. There is. Since it is not possible to measure up to the power level of such a data area only by SA decoding, there is a concern that the resources that can actually be used will be excluded as they cannot be transmitted.

To solve the above problems, it was agreed that LTE V2X will be used in combination with Energy measurement and SA decoding. Energy measurement can complement SA decoding because it can measure actual resource usage at power level.

FIG. 15 is an explanatory diagram showing a sensing operation in LTE V2X. FIG. 15 shows an example of a sensing operation for selecting a resource from the resource pool.

Specifically, the terminal device selects a resource in the resource selection window and reserves a future resource based on the power measurement result in the sensing window and the resource reservation status in the sensing window. As a specific example, in the example shown in FIG. 15, when a packet to be transmitted is generated, the terminal device uses the future resource usage status, for example, another packet in the future, based on the sensing result. Predict the resources used for transmission. By using the result of the prediction, the terminal device can select and reserve a resource that can be used for transmitting the packet, that is, a resource that is predicted not to be used for transmitting another packet.

<< 4. Control of side link V2V communication between sender and receiver >>
Compared to LTE, NR has stricter requirements. In LTE, the minimum reservation period is 20 ms, while in NR, use cases with tighter latency requirements (3 ms) are supported. Therefore, the methods used in LTE may not meet the latency requirements. Further, while LTE requires about 90% reliability, NR requires almost 100% reliability, so there is a possibility that the method used in LTE cannot meet the reliability requirement. There is.

In Mode3, collision-free resources can be allocated, but due to resource scheduling, the overhead of scheduling request and response is large. In Mode4, since the terminal device selects resources by itself, the overhead is small, but resource collisions are likely to occur, so the performance of side link communication deteriorates.

Therefore, the Discloser has made a diligent study on a technology capable of side-link communication that can meet stricter latency requirements and reliability requirements. As a result, the Discloser will meet stricter latency and reliability requirements by having a third party other than the sender / receiver control sidelink communication between the sender / receiver through the sidelink, as explained below. We have come up with a technology that enables side-link communication that can be satisfied.

In the following, the terminal device that is the above-mentioned third party and controls the terminal device that performs side-link communication is referred to as "Master UE", and the terminal device that is controlled by the Master UE for side-link communication is referred to as "Slave UE". I will call it.

To become a Master UE, it is necessary to have at least one of the capabilities of being able to schedule resources for side-link communication or being able to assist resource allocation of other terminal devices in side-link communication of other terminal devices. And. In side-link communication of other terminal devices, being able to assist resource allocation of other terminal devices specifically means providing information related to resource selection (for example, sensing results) and applying constraint information to transmission parameters. , Control side link communication, etc. Applying constraint information to transmission parameters means, for example, restricting resources that can be selected for side-link communication of other terminal devices and MCS (Modulation and Coding Scheme).

The terminal device that can become a Master UE may be, for example, a terminal device that is a UE-type RSU (Road Site Unit), or may be a terminal device selected from a plurality of terminal devices. The plurality of terminal devices may randomly select a Master UE, or may become Master UEs in a predetermined order.

FIG. 16 is a flow chart showing an outline of control of side link V2V communication between transmitters and receivers according to the embodiment of the present disclosure. FIG. 16 shows the operations of the base station 100 (Base Station), the Master UE, and the Slave UE.

The base station 100 sets an intervention level at which the Master UE can intervene in the side link communication and an operation that can be performed (step S101). In the conventional LTE V2X, the base station has instructed Mode3 (scheduled-14) or Mode4 (ue-selected-r14) as the resource allocation method of the terminal device. In the present embodiment, since a mode called side link control by the Master UE is introduced, a mode called side link control by the Master UE (for example, master-controlled-r14) is instructed.

When the base station 100 sets the intervention level and the operations that can be performed in step S101, the base station 100 notifies the Master UE of the contents of the setting (step S102). The Master UE that has received the notification from the base station 100 sets the side link control information according to the notification (step S103). This side link control information is information for controlling side link communication by the Slave UE, and a specific example will be described later.

The Master UE notifies the Slave UE of the side link control information (step S104). Then, the Slave UE performs side link communication according to the side link control information set by the Master UE (step S105). This enables the Slave UE to perform side-link communication that can meet strict latency and reliability requirements.

In this embodiment, Master UEs are to be separated at different intervention levels in the control of sidelinks. This intervention level is an example of the operating level of the present disclosure. For example, level 1 may be an intervention level of information collection and information sharing, level 2 of terminal constraint, and level 3 of terminal control. Of course, the number of levels and the operations corresponding to those levels are not limited to the above examples. An example of each level procedure is described below.

(Level 1 ・ Information collection and information sharing)
The level 1 Master UE collects the information required for side link communication and shares it with the Slave UE. The shared information determines how the Slave UE will use it. FIG. 17 is a flow chart showing an outline of control of side link V2V communication between transmitters and receivers according to the embodiment of the present disclosure. FIG. 17 shows the operation of the base station 100 (Base Station), the level 1 Master UE, and the Slave UE.

Base station 100 sets an intervention level at which the Master UE can intervene in side-link communication and an operation that can be performed (step S111). Here, the base station 100 sets level 1 as the intervention level of the Master UE. When the base station 100 sets the intervention level and the operations that can be performed in step S111, the base station 100 notifies the Master UE of the contents of the setting (step S112). The Master UE that has received the notification from the base station 100 sets the side link control information according to the notification (step S113).

The Master UE is, for example, a CBR (Channel Busy Ratio) within a certain period (T1 to T2), a channel resource occupancy ratio (Channel Occupancy Ratio) for each terminal device, and a resource usage status within a certain period (for example, for each subchannel). RSSI (Received Signal Strength Indicator), traffic model of other terminal device, priority information of transmitted packet of other terminal device, service type of transmitted packet of other terminal device, position, speed of other terminal device, Collect and share information such as the direction of movement with the Slave UE.

The Master UE may collect such information by sensing it by itself, or may collect it by receiving notification from the base station 100. Further, the Master UE may collect such information by receiving notification from another Master UE. Further, the Master UE may collect such information by receiving notification from another communication device (not limited to the Slave UE). If you want to be notified by another communication device, you may have the other communication device report regularly. Further, when receiving notification from another communication device, a request may be sent to the other communication device, and the communication device may report in response to the request. When receiving a report from another communication device, the base station or Master UE may schedule the reporting timing and transmission resource for reporting to the other communication device, or may set it in the other communication device. good. When receiving a report from another communication device, the timing of the report may be explicitly instructed or implicitly instructed. For example, the base station or Master UE may be configured in another communication device to report after receiving an X subframe (X is an integer of 1 or more) after receiving the request.

The Master UE notifies the Slave UE of the information related to the side link transmission (step S114). Then, the Slave UE refers to the information shared by the Master UE and performs side link communication (step S115).

The Master UE may share the collected information to the Slave UE through the RRC (Radio Resource Control) of the side link. The Master UE may also share the collected information with the Slave UE through a Physical sidelink channel (eg, PSCCH or PSSCH).

(Level 2 / Terminal restrictions)
The level 2 Master UE constrains parameters related to transmission of a terminal device that performs side-link communication. That is, the level 2 Master UE can impose certain restrictions on the parameters required for the side link communication of the Slave UE. For example, a level 2 Master UE can set candidates for certain parameters. The Slave UE can select a resource for transmission from the candidate parameters set by the Master UE. Further, the level 2 Master UE can limit the area in which the Slave UE performs sensing. The Slave UE senses the usage status of only the resources in the sensing area limited by the Master UE. This enables the Slave UE to perform side-link communication that can meet strict latency and reliability requirements.

FIG. 18 is a flow chart showing an outline of control of side link V2V communication between transmitters and receivers according to the embodiment of the present disclosure. FIG. 18 shows the operation of the base station 100 (Base Station), the level 2 Master UE, and the Slave UE.

Base station 100 sets an intervention level at which the Master UE can intervene in side-link communication and an operation that can be performed (step S121). Here, the base station 100 sets level 2 as the intervention level of the Master UE. When the base station 100 sets the intervention level and the operations that can be performed in step S121, the base station 100 notifies the Master UE of the contents of the setting (step S122). The Master UE that has received the notification from the base station 100 sets the side link control information according to the notification (step S123).

The Master UE notifies the Slave UE of the constrained parameters related to the side link transmission (step S124). Then, the Slave UE refers to the information constrained by the Master UE and performs side link communication (step S125).

Parameters that can be constrained by the Level 2 Master UE include, for example, parameters related to the sensing window, a set of candidate resources that can be transmitted, a maximum value of transmission power, a selectable MCS, a configurable resource reservation cycle, and a configurable resource selection. Counter, resource pool that can send HARQ Feedback, resource pool that can send measurement results at the time of reporting, parameters related to MIMO, component that can be carrier aggregated Number of carrier retransmissions (for example, maximum number of retransmissions), repetition (Repetition) transmission (For example, the maximum number of repetitions). The Level 2 Master UE may constrain any of the sensing time domain, the sensing frequency domain, the sensing time and the frequency domain as parameters relating to the sensing window. The level 2 Master UE may constrain any of the time resource set, the frequency resource set, the time and the frequency resource set capable of sidelink communication as the candidate resource set that can be transmitted. Level 2 Master UEs may constrain beam patterns (eg, beam angle, width, beam sweeping range), antenna port patterns used by Slave UEs as parameters related to MIMO.

When constraining the above-mentioned parameters, the level 2 Master UE may constrain the selectable candidates of the parameters, or may constrain the parameters by setting the limit value of the parameters. When constraining the selectable candidates for a parameter, the Level 2 Master UE may constrain the selectable range of the parameter or constrain the selectable candidate for the parameter in the form of a bitmap.

The base station 100 may notify the Master UE of the parameters to be constrained, or may con-figure (pre-con-figure) the Master UE. Then, in step S124, the Master UE notifies the Slave UE of the parameter to be constrained through the side link.

(Level 3 / Terminal control)
The Level 3 Master UE reliably controls the parameters required for side-link communication of the Slave UE. For example, a Level 3 Master UE schedules time and frequency resources for sidelink communication.

FIG. 19 is a flow chart showing an outline of control of side link V2V communication between transmitters and receivers according to the embodiment of the present disclosure. FIG. 19 shows the operation of the base station 100 (Base Station), the level 3 Master UE, and the Slave UE.

The base station 100 sets an intervention level at which the Master UE can intervene in the side link communication and an operation that can be performed (step S131). Here, the base station 100 sets level 3 as the intervention level of the Master UE. When the base station 100 sets the intervention level and the operations that can be performed in step S131, the base station 100 notifies the Master UE of the contents of the setting (step S132). The Master UE that has received the notification from the base station 100 sets the side link control information according to the notification (step S133).

Level 3 Master UEs have controllable parameters such as at least one of the time or frequency resources for side-link transmission, transmission power, MCS for transmission, channel resource upper limit (CR limit), resource reservation cycle, and resources. Selection counter, at least one of the time or frequency resources for HARQ Feedback transmission, at least one of the time or frequency resources for transmission to use when reporting measurement results, MIMO-related parameters, carrier aggregation-related parameters, repetitive transmission The number of times etc. can be controlled.

The Master UE notifies the Slave UE of the constrained parameters related to the side link transmission (step S134). Then, the Slave UE refers to the information constrained by the Master UE and performs side link communication (step S135).

The base station 100 may notify the Master UE of the parameters to be controlled, or may con-figure (pre-con-figure) the Master UE. Then, in step S134, the Master UE notifies the Slave UE of the parameter to be constrained through the side link.

The intervention levels have been described above. In the control of the side link by the Master UE, it is necessary to set at least the intervention level and the operations that can be performed at the intervention level. Therefore, the intervention level and the method of setting the operation that can be performed at the intervention level will be described below.

Here, the case where the Master UE is within the coverage of the base station 100 (In coverage) and the case where the Master UE is out-of-coverage will be described separately.

If the Master UE is within the coverage of Base Station 100, Base Station 100 may instruct the Master UE of the intervention level and mapping information of operations that can be performed at that intervention level. Further, when the Master UE is within the coverage of the base station 100, the base station 100 may notify the intervention level, and the mapping information of the operations that can be performed at the intervention level may be precomfied in the master UE. ..

On the other hand, when the Master UE is out of the coverage of the base station 100, the base station 100 may preconfigure the intervention level and the mapping information of the operations that can be performed at the intervention level to the master UE. The Master UE may set the intervention level and the operations that can be performed at the intervention level based on the precomposed information.

The above mapping information may be roughly mapped. For example, level 1 may be information collection / sharing, level 2 may be terminal restriction, and level 3 may be terminal control. In this case, the Master UE specifically decides which information to collect and share and which parameters to constrain or control. Further, the above-mentioned mapping information may be finely set. For example, level 1 may be such as collecting and sharing information on sensing results.

The setting timing may be when the Master UE connects to the base station, or when the Master UE receives a level setting request from the base station, and the Master UE is in the RRC-CONNECTED state. It may be time.

The base station 100 uses, for example, PBCH (Physical Broadcast Channel), SIB (System Information Block), RRC (Radio Resource Control) signaling, PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), and the like. The UE may be notified of the intervention level and the operations that can be performed at that intervention level.

When setting the intervention level and the operations that can be performed at the intervention level in the Master UE, the base station 100 is set in consideration of, for example, CBR information, the location information of the Master UE, the capabilities of the Master UE, the traffic model of the Master UE, and the like. May be done. The case where the position information of the Master UE is taken into consideration will be described as an example. For example, it is considered that the density of the Slave UE differs depending on the position of the Master UE. It is desirable that the higher the number of Slave UEs to manage, the higher the intervention level of the Master UE. If the intervention level of the Master UE is low (for example, only information can be collected and shared), the Slave UE will select the resource by itself, and resource collision is likely to occur. Therefore, if the Master UEs are arranged so that the number of Slave UEs to be managed is large, the base station 100 may set the intervention level high.

FIG. 20 is a flow chart showing an outline of control of side link V2V communication between transmitters and receivers according to the embodiment of the present disclosure. FIG. 20 shows the operation of the base station 100 (Base Station), the Master UE, and the Slave UE.

Base station 100 sets an intervention level at which the Master UE can intervene in side-link communication and an operation that can be performed (step S141). When the base station 100 sets the intervention level and the operations that can be performed in step S141, the base station 100 notifies the Master UE of the contents of the setting (step S142). The base station 100 also sends an activation request to the Master UE when setting the intervention level and the operations that can be performed (step S143). The Master UE that has received the activation request from the base station 100 sets the side link control information according to the notification (step S144).

Subsequently, the Master UE notifies the Slave UE of the side link control information (step S145). Then, the Slave UE performs side link communication according to the side link control information set by the Master UE (step S146).

The Slave UE executes V2X communication based on the information sent from the Master UE. Here, how the Slave UE discovers the Master UE will be described.

The Slave UE controlled by the side link to the Master UE discovers the Master UE. At this time, the Slave UE may search for the Master UE by broadcasting a discovery request to the surroundings. In addition, the Master UE may broadcast a discovery announcement to the surroundings to search for the Slave UE.

The Slave UE performs measurement when it receives a measurement instruction from the base station 100 or the Master UE. The Slave UE then reports the measurement result to the Master UE at the indicated measurement reporting timing. Alternatively, the Slave UE may, when receiving instructions for measurement and reporting from the base station 100 or the Master UE on a regular basis, perform the measurement at a set cycle and report the measurement to the Master UE.

When the Master UE shares information with the Slave UE, the Slave UE refers to the information shared by the Master UE and performs side link communication. For example, when the Master UE shares the sensing result, the Slave UE can select the transmission resource by using the sensing result of its own device and the sensing result of the Master UE.

When the Master UE constrains the parameters related to the side link communication of the Slave UE, the Slave UE performs the side link transmission according to the constraint of the Master UE. For example, if the sensing area is constrained by the Master UE, the Slave UE will only sense the constrained area. Further, for example, when the CR (channel resource) is constrained by the Master UE, the Slave UE selects the resource for side link communication so as not to exceed the upper limit (CR limit) of the channel resource.

When the Master UE controls the parameters related to the side link communication of the Slave UE, the Slave UE performs the side link transmission by using the resources scheduled by the Master UE and the parameters related to the set side link transmission.

As described above, in the present embodiment, the Slave UE manages the side link communication by the Master UE. Therefore, the Slave UE according to the present embodiment enables side-link communication that can satisfy strict latency requirements and reliability requirements.

<< 5. Application example >>
<5.1. Application examples related to base stations>
(First application example)
FIG. 21 is a block diagram showing a first example of a schematic configuration of an eNB to which the techniques according to the present disclosure can be applied. The eNB 800 has one or more antennas 810 and a base station device 820. Each antenna 810 and base station device 820 may be connected to each other via an RF cable.

Each of the antennas 810 has a single antenna element or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna) and is used for transmitting and receiving a radio signal by the base station apparatus 820. The eNB 800 has a plurality of antennas 810 as shown in FIG. 21, and the plurality of antennas 810 may correspond to, for example, a plurality of frequency bands used by the eNB 800. Although FIG. 21 shows an example in which the eNB 800 has a plurality of antennas 810, the eNB 800 may have a single antenna 810.

The base station apparatus 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.

The controller 821 may be, for example, a CPU or a DSP, and operates various functions of the upper layer of the base station apparatus 820. For example, the controller 821 generates a data packet from the data in the signal processed by the wireless communication interface 825, and transfers the generated packet via the network interface 823. The controller 821 may generate a bundled packet by bundling data from a plurality of baseband processors and transfer the generated bundled packet. Further, the controller 821 is a logic that executes control such as radio resource control (Radio Resource Control), radio bearer control (Radio Bearer Control), mobility management (Mobility Management), inflow control (Admission Control), or scheduling (Scheduling). Function. Further, the control may be executed in cooperation with the surrounding eNB or the core network node. The memory 822 includes a RAM and a ROM, and stores a program executed by the controller 821 and various control data (for example, a terminal list, transmission power data, scheduling data, and the like).

The network interface 823 is a communication interface for connecting the base station apparatus 820 to the core network 824. Controller 821 may communicate with a core network node or other eNB via network interface 823. In that case, the eNB 800 and the core network node or other eNB may be connected to each other by a logical interface (for example, S1 interface or X2 interface). The network interface 823 may be a wired communication interface or a wireless communication interface for a wireless backhaul. When the network interface 823 is a wireless communication interface, the network interface 823 may use a frequency band higher than the frequency band used by the wireless communication interface 825 for wireless communication.

The wireless communication interface 825 supports either a cellular communication method such as LTE (Long Term Evolution) or LTE-Advanced, and provides a wireless connection to a terminal located in the cell of the eNB 800 via the antenna 810. The wireless communication interface 825 may typically include a baseband (BB) processor 826, an RF circuit 827, and the like. The BB processor 826 may perform, for example, coding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and may perform each layer (for example, L1, MAC (Medium Access Control), RLC (Radio Link Control), and PDCP. (Packet Data Convergence Protocol)) Performs various signal processing. The BB processor 826 may have some or all of the above-mentioned logical functions instead of the controller 821. The BB processor 826 may be a module including a memory for storing a communication control program, a processor for executing the program, and related circuits, and the function of the BB processor 826 may be changed by updating the above program. good. Further, the module may be a card or a blade inserted into the slot of the base station device 820, or may be a chip mounted on the card or the blade. On the other hand, the RF circuit 827 may include a mixer, a filter, an amplifier, and the like, and transmits and receives radio signals via the antenna 810.

The wireless communication interface 825 includes a plurality of BB processors 826 as shown in FIG. 21, and the plurality of BB processors 826 may correspond to a plurality of frequency bands used by, for example, the eNB 800. Further, the wireless communication interface 825 includes a plurality of RF circuits 827 as shown in FIG. 21, and the plurality of RF circuits 827 may correspond to, for example, a plurality of antenna elements. Although FIG. 21 shows an example in which the wireless communication interface 825 includes a plurality of BB processors 826 and a plurality of RF circuits 827, the wireless communication interface 825 includes a single BB processor 826 or a single RF circuit 827. It may be.

In the eNB 800 shown in FIG. 21, one or more components included in the base station 100 described with reference to FIG. 2 (for example, at least one of a communication control unit 151, an information acquisition unit 153, and a notification unit 155). May be implemented in the wireless communication interface 825. Alternatively, at least some of these components may be implemented in controller 821. As an example, the eNB 800 may include a module including a part (for example, a BB processor 826) or all of the wireless communication interface 825 and / or a controller 821, and the module may be equipped with one or more of the above components. good. In this case, the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components). You may run the program. As another example, even if a program for making the processor function as one or more of the above components is installed in the eNB 800 and the wireless communication interface 825 (eg, BB processor 826) and / or the controller 821 executes the program. good. As described above, the eNB 800, the base station device 820, or the module may be provided as a device including the one or more components, and a program for making the processor function as the one or more components is provided. You may. Further, a readable recording medium on which the above program is recorded may be provided.

Further, in the eNB 800 shown in FIG. 21, the wireless communication unit 120 described with reference to FIG. 2 may be mounted on the wireless communication interface 825 (for example, RF circuit 827). Further, the antenna unit 110 may be mounted on the antenna 810. Further, the network communication unit 130 may be implemented in the controller 821 and / or the network interface 823. Further, the storage unit 140 may be mounted in the memory 822.

(Second application example)
FIG. 22 is a block diagram showing a second example of a schematic configuration of an eNB to which the techniques according to the present disclosure can be applied. The eNB 830 has one or more antennas 840, a base station device 850, and an RRH860. Each antenna 840 and RRH860 may be connected to each other via an RF cable. Further, the base station apparatus 850 and RRH860 may be connected to each other by a high-speed line such as an optical fiber cable.

Each of the antennas 840 has a single or multiple antenna elements (eg, a plurality of antenna elements constituting a MIMO antenna) and is used for transmitting and receiving radio signals by the RRH860. The eNB 830 has a plurality of antennas 840 as shown in FIG. 22, and the plurality of antennas 840 may correspond to a plurality of frequency bands used by the eNB 830, for example. Although FIG. 22 shows an example in which the eNB 830 has a plurality of antennas 840, the eNB 830 may have a single antenna 840.

The base station apparatus 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855, and a connection interface 857. The controller 851, memory 852, and network interface 853 are similar to the controller 821, memory 822, and network interface 823 described with reference to FIG.

The wireless communication interface 855 supports either a cellular communication method such as LTE or LTE-Advanced, and provides a wireless connection to terminals located in the sector corresponding to the RRH860 via the RRH860 and the antenna 840. The wireless communication interface 855 may typically include a BB processor 856 and the like. The BB processor 856 is similar to the BB processor 826 described with reference to FIG. 21 except that it is connected to the RF circuit 864 of the RRH860 via the connection interface 857. The wireless communication interface 855 includes a plurality of BB processors 856 as shown in FIG. 22, and the plurality of BB processors 856 may correspond to a plurality of frequency bands used by, for example, the eNB 830. Although FIG. 22 shows an example in which the wireless communication interface 855 includes a plurality of BB processors 856, the wireless communication interface 855 may include a single BB processor 856.

The connection interface 857 is an interface for connecting the base station device 850 (wireless communication interface 855) to the RRH860. The connection interface 857 may be a communication module for communication on the high-speed line that connects the base station apparatus 850 (wireless communication interface 855) and the RRH860.

The RRH860 also includes a connection interface 861 and a wireless communication interface 863.

The connection interface 861 is an interface for connecting the RRH860 (wireless communication interface 863) to the base station device 850. The connection interface 861 may be a communication module for communication on the high-speed line.

The wireless communication interface 863 transmits and receives wireless signals via the antenna 840. The wireless communication interface 863 may typically include RF circuits 864 and the like. The RF circuit 864 may include a mixer, a filter, an amplifier, and the like, and transmits and receives radio signals via the antenna 840. As shown in FIG. 22, the wireless communication interface 863 includes a plurality of RF circuits 864, and the plurality of RF circuits 864 may correspond to, for example, a plurality of antenna elements. Although FIG. 22 shows an example in which the wireless communication interface 863 includes a plurality of RF circuits 864, the wireless communication interface 863 may include a single RF circuit 864.

In the eNB 830 shown in FIG. 22, one or more components included in the base station 100 described with reference to FIG. 2 (for example, at least one of a communication control unit 151, an information acquisition unit 153, and a notification unit 155). May be implemented in wireless communication interface 855 and / or wireless communication interface 863. Alternatively, at least some of these components may be implemented in controller 851. As an example, the eNB 830 includes a module including a part (for example, BB processor 856) or all of the wireless communication interface 855 and / or a controller 851, and even if one or more of the above components are implemented in the module. good. In this case, the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components). You may run the program. As another example, even if a program for making the processor function as one or more of the above components is installed in the eNB 830 and the wireless communication interface 855 (eg, BB processor 856) and / or the controller 851 executes the program. good. As described above, the eNB 830, the base station device 850, or the module may be provided as a device including the one or more components, and a program for making the processor function as the one or more components is provided. You may. Further, a readable recording medium on which the above program is recorded may be provided.

Further, in the eNB 830 shown in FIG. 22, for example, the wireless communication unit 120 described with reference to FIG. 2 may be mounted on the wireless communication interface 863 (for example, RF circuit 864). Further, the antenna unit 110 may be mounted on the antenna 840. Further, the network communication unit 130 may be implemented in the controller 851 and / or the network interface 853. Further, the storage unit 140 may be mounted in the memory 852.

<5.2. Application examples related to terminal devices>
(First application example)
FIG. 23 is a block diagram showing an example of a schematic configuration of a smartphone 900 to which the technology according to the present disclosure can be applied. The smartphone 900 includes a processor 901, a memory 902, a storage 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, and one or more antenna switches 915. It comprises one or more antennas 916, bus 917, battery 918 and auxiliary controller 919.

The processor 901 may be, for example, a CPU or a SoC (System on Chip), and controls the functions of the application layer and other layers of the smartphone 900. Memory 902 includes RAM and ROM and stores programs and data executed by processor 901. The storage 903 may include a storage medium such as a semiconductor memory or a hard disk. The external connection interface 904 is an interface for connecting an external device such as a memory card or a USB (Universal Serial Bus) device to the smartphone 900.

The camera 906 has an image pickup device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and generates an captured image. The sensor 907 may include, for example, a group of sensors such as a positioning sensor, a gyro sensor, a geomagnetic sensor and an acceleration sensor. The microphone 908 converts the voice input to the smartphone 900 into a voice signal. The input device 909 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch for detecting a touch on the screen of the display device 910, and receives an operation or information input from the user. The display device 910 has a screen such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, and displays an output image of the smartphone 900. The speaker 911 converts the voice signal output from the smartphone 900 into voice.

The wireless communication interface 912 supports any cellular communication method such as LTE or LTE-Advanced and performs wireless communication. The wireless communication interface 912 may typically include a BB processor 913, an RF circuit 914, and the like. The BB processor 913 may perform, for example, coding / decoding, modulation / demodulation, multiplexing / demultiplexing, and the like, and performs various signal processing for wireless communication. On the other hand, the RF circuit 914 may include a mixer, a filter, an amplifier, and the like, and transmits and receives radio signals via the antenna 916. The wireless communication interface 912 may be a one-chip module in which a BB processor 913 and an RF circuit 914 are integrated. The wireless communication interface 912 may include a plurality of BB processors 913 and a plurality of RF circuits 914 as shown in FIG. Although FIG. 23 shows an example in which the wireless communication interface 912 includes a plurality of BB processors 913 and a plurality of RF circuits 914, the wireless communication interface 912 includes a single BB processor 913 or a single RF circuit 914. It may be.

Further, the wireless communication interface 912 may support other types of wireless communication systems such as a short-range wireless communication system, a proximity wireless communication system, or a wireless LAN (Local Area Network) system, in addition to the cellular communication system. In that case, the BB processor 913 and the RF circuit 914 for each wireless communication system may be included.

Each of the antenna switches 915 switches the connection destination of the antenna 916 between a plurality of circuits included in the wireless communication interface 912 (for example, circuits for different wireless communication methods).

Each of the antennas 916 has a single or multiple antenna elements (eg, a plurality of antenna elements constituting a MIMO antenna) and is used for transmitting and receiving radio signals by the wireless communication interface 912. The smartphone 900 may have a plurality of antennas 916 as shown in FIG. Although FIG. 23 shows an example in which the smartphone 900 has a plurality of antennas 916, the smartphone 900 may have a single antenna 916.

Further, the smartphone 900 may be provided with an antenna 916 for each wireless communication method. In that case, the antenna switch 915 may be omitted from the configuration of the smartphone 900.

The bus 917 connects the processor 901, the memory 902, the storage 903, the external connection interface 904, the camera 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and the auxiliary controller 919 to each other. .. The battery 918 supplies electric power to each block of the smartphone 900 shown in FIG. 23 via a power supply line partially shown by a broken line in the figure. The auxiliary controller 919 operates the minimum necessary functions of the smartphone 900, for example, in the sleep mode.

In the smartphone 900 shown in FIG. 23, at least one of one or more components (for example, communication control unit 241, information acquisition unit 243, and notification unit 247) included in the terminal device 200 described with reference to FIG. ) May be implemented in the wireless communication interface 912. Alternatively, at least some of these components may be implemented in processor 901 or auxiliary controller 919. As an example, the smartphone 900 includes a module including a part (for example, BB processor 913) or all of the wireless communication interface 912, a processor 901, and / or an auxiliary controller 919, and one or more of the above-mentioned components in the module. May be implemented. In this case, the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components). You may run the program. As another example, a program for making the processor function as one or more of the above components is installed in the smartphone 900, the wireless communication interface 912 (eg, BB processor 913), the processor 901, and / or the auxiliary controller 919. You may run the program. As described above, the smartphone 900 or the module may be provided as a device including the one or more components, and a program for making the processor function as the one or more components may be provided. Further, a readable recording medium on which the above program is recorded may be provided.

Further, in the smartphone 900 shown in FIG. 23, for example, the wireless communication unit 220 described with reference to FIG. 3 may be mounted on the wireless communication interface 912 (for example, RF circuit 914). Further, the antenna unit 210 may be mounted on the antenna 916. Further, the storage unit 230 may be mounted in the memory 902.

(Second application example)
FIG. 24 is a block diagram showing an example of a schematic configuration of a car navigation device 920 to which the technique according to the present disclosure can be applied. The car navigation device 920 includes a processor 921, a memory 922, a GPS (Global Positioning System) module 924, a sensor 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, and wireless communication. It comprises an interface 933, one or more antenna switches 936, one or more antennas 937, and a battery 938.

The processor 921 may be, for example, a CPU or SoC, and controls the navigation function and other functions of the car navigation device 920. Memory 922 includes RAM and ROM and stores programs and data executed by processor 921.

The GPS module 924 uses GPS signals received from GPS satellites to measure the position (eg, latitude, longitude and altitude) of the car navigation device 920. The sensor 925 may include, for example, a group of sensors such as a gyro sensor, a geomagnetic sensor and a barometric pressure sensor. The data interface 926 is connected to the vehicle-mounted network 941 via a terminal (not shown), and acquires data generated on the vehicle side such as vehicle speed data.

The content player 927 reproduces the content stored in the storage medium (for example, a CD or DVD) inserted into the storage medium interface 928. The input device 929 includes, for example, a touch sensor, a button, or a switch that detects a touch on the screen of the display device 930, and receives an operation or information input from the user. The display device 930 has a screen such as an LCD or an OLED display, and displays an image of a navigation function or a content to be reproduced. The speaker 931 outputs the sound of the navigation function or the content to be played.

The wireless communication interface 933 supports any cellular communication method such as LTE or LTE-Advanced and performs wireless communication. The wireless communication interface 933 may typically include a BB processor 934, an RF circuit 935, and the like. The BB processor 934 may perform, for example, coding / decoding, modulation / demodulation, multiplexing / demultiplexing, and the like, and performs various signal processing for wireless communication. On the other hand, the RF circuit 935 may include a mixer, a filter, an amplifier, and the like, and transmits and receives radio signals via the antenna 937. The wireless communication interface 933 may be a one-chip module in which a BB processor 934 and an RF circuit 935 are integrated. The wireless communication interface 933 may include a plurality of BB processors 934 and a plurality of RF circuits 935 as shown in FIG. 24. Although FIG. 24 shows an example in which the wireless communication interface 933 includes a plurality of BB processors 934 and a plurality of RF circuits 935, the wireless communication interface 933 includes a single BB processor 934 or a single RF circuit 935. It may be.

Further, the wireless communication interface 933 may support other types of wireless communication systems such as a short-range wireless communication system, a proximity wireless communication system, or a wireless LAN system in addition to the cellular communication system. A BB processor 934 and an RF circuit 935 for each communication method may be included.

Each of the antenna switches 936 switches the connection destination of the antenna 937 between a plurality of circuits included in the wireless communication interface 933 (for example, circuits for different wireless communication methods).

Each of the antennas 937 has a single or multiple antenna elements (eg, a plurality of antenna elements constituting a MIMO antenna) and is used for transmitting and receiving radio signals by the wireless communication interface 933. The car navigation device 920 may have a plurality of antennas 937 as shown in FIG. 24. Although FIG. 24 shows an example in which the car navigation device 920 has a plurality of antennas 937, the car navigation device 920 may have a single antenna 937.

Further, the car navigation device 920 may be provided with an antenna 937 for each wireless communication system. In that case, the antenna switch 936 may be omitted from the configuration of the car navigation device 920.

The battery 938 supplies electric power to each block of the car navigation device 920 shown in FIG. 24 via a power supply line partially shown by a broken line in the figure. In addition, the battery 938 stores electric power supplied from the vehicle side.

In the car navigation device 920 shown in FIG. 24, one or more components (for example, communication control unit 241 and information acquisition unit) included in the terminal device 200 described with reference to FIG. 3 described with reference to FIG. At least one of 243 and notification unit 247) may be implemented in the wireless communication interface 933. Alternatively, at least some of these components may be implemented in processor 921. As an example, the car navigation device 920 includes a module including a part (for example, BB processor 934) or all and / or a processor 921 of the wireless communication interface 933, in which one or more of the above components are mounted. You may. In this case, the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components). You may run the program. As another example, a program for making the processor function as one or more of the above components is installed in the car navigation device 920, and the wireless communication interface 933 (eg, BB processor 934) and / or the processor 921 executes the program. You may. As described above, the car navigation device 920 or the module may be provided as a device including the one or more components, or a program for making the processor function as the one or more components may be provided. good. Further, a readable recording medium on which the above program is recorded may be provided.

Further, in the car navigation device 920 shown in FIG. 24, for example, the wireless communication unit 220 described with reference to FIG. 3 may be mounted on the wireless communication interface 933 (for example, RF circuit 935). Further, the antenna unit 210 may be mounted on the antenna 937. Further, the storage unit 230 may be mounted in the memory 922.

Further, the technique according to the present disclosure may be realized as an in-vehicle system (or vehicle) 940 including one or more blocks of the car navigation device 920 described above, an in-vehicle network 941, and a vehicle-side module 942. The vehicle-side module 942 generates vehicle-side data such as vehicle speed, engine speed, or failure information, and outputs the generated data to the vehicle-mounted network 941.

<< 6. Summary >>
As described above, according to the embodiment of the present disclosure, there is provided a terminal device capable of efficiently sensing resources in NR V2X communication, and a base station device that wirelessly communicates with the terminal device. ..

Although the embodiment of the present disclosure has been described mainly for V2X communication, the present disclosure is not limited to such an example and is an extension of the side link, so that it can be applied to use cases other than V2X communication. Needless to say. For example, the technique shown in the embodiments of the present disclosure can be applied to D2D communication, MTC communication, moving cell, relay communication, and the like. The embodiment of the present disclosure may also be applied to multi-carrier communication in which side-link communication is performed using a plurality of carriers.

The base station 100 shown in FIG. 2 can function as an example of the control device of the present disclosure. Then, in the configuration of the base station 100 shown in FIG. 2, the wireless communication unit 120 can function as the communication unit of the control device of the present disclosure, and the control unit 150 can function as the control unit of the control device of the present disclosure.

The terminal device 200 shown in FIG. 3 can function as an example of the communication device of the present disclosure. Then, in the configuration of the terminal device 200 shown in FIG. 3, the wireless communication unit 220 can function as the communication unit of the communication device of the present disclosure, and the control unit 240 can function as the control unit of the communication device of the present disclosure. Further, the terminal device 200 may be a device provided in the mobile body. And the moving body can be a vehicle.

Each step in the process performed by each device of the present specification does not necessarily have to be processed in chronological order in the order described as a sequence diagram or a flowchart. For example, each step in the process executed by each device may be processed in an order different from the order described in the flowchart, or may be processed in parallel.

In addition, it is possible to create a computer program for making the hardware such as the CPU, ROM, and RAM built in each device exhibit the same functions as the configuration of each device described above. It is also possible to provide a storage medium in which the computer program is stored. Further, by configuring each functional block shown in the functional block diagram with hardware, a series of processes can be realized by hardware.

Although the preferred embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the technical scope of the present disclosure is not limited to such examples. It is clear that anyone with ordinary knowledge in the technical field of the present disclosure may come up with various modifications or modifications within the scope of the technical ideas set forth in the claims. Is, of course, understood to belong to the technical scope of the present disclosure.

In addition, the effects described herein are merely explanatory or exemplary and are not limited. That is, the techniques according to the present disclosure may exhibit other effects apparent to those skilled in the art from the description herein, in addition to or in place of the above effects.

The following configurations also belong to the technical scope of the present disclosure.
(1)
An acquisition unit that acquires information for operating as a master for controlling side-link communication between other devices from a base station device, and an acquisition unit.
A control unit that executes a process for operating as the master based on the information acquired by the acquisition unit, and a control unit.
A communication device.
(2)
The communication device according to (1) above, wherein the acquisition unit acquires information for operating as one of a plurality of operation levels as the operation level of the master.
(3)
The operation level of the master is a first level that collects information for side link communication and shares it with the other device, a second level that restricts the operation of the side link communication of the other device, and the operation level of the other device. The communication device according to (2) above, which has at least a third level for controlling the operation of side link communication.
(4)
The communication device according to (3) above, wherein when operating at the first level, the control unit shares information on the usage status of resources used in side link communication with the other device.
(5)
The communication device according to (3) above, wherein when operating at the first level, the control unit executes sensing of information shared with the other device.
(6)
The communication device according to (3), wherein when operating at the first level, the acquisition unit acquires information shared with the other device from the other device.
(7)
The communication device according to (3) above, wherein when operating at the second level, the control unit constrains parameters related to side link communication with respect to the other device.
(8)
The communication device according to (7), wherein when operating at the second level, the control unit provides information for constraining the sensing region to the other device.
(9)
The communication device according to (3) above, wherein when operating at the third level, the control unit controls parameters related to side link communication with respect to the other device.
(10)
The communication device according to (9) above, wherein when operating at the third level, the control unit executes a resource schedule for side link communication with respect to the other device.
(11)
A control unit that sets information for the communication device to operate as a master for controlling side-link communication between other devices.
A communication unit that transmits information set by the control unit to the communication device in order to operate the communication device as the master.
A control device.
(12)
The control device according to (11) above, wherein the communication unit transmits information for operating as one of a plurality of operation levels as the operation level of the master.
(13)
The operation level of the master is a first level that collects information for side link communication and shares it with the other device, a second level that restricts the operation of the side link communication of the other device, and the operation level of the other device. The control device according to (12) above, which has at least a third level for controlling the operation of side link communication.
(14)
The control device according to (12) or (13), wherein the control unit sets an operation that can be executed by the master for each operation level.
(15)
The control device according to any one of (12) to (14), wherein the communication unit transmits at least the operation level to the communication device if the communication device to be operated as the master is within the coverage.
(16)
The control device according to any one of (12) to (15) above, wherein the communication unit transmits information for operating as any operation level at the timing when the communication device is connected to the own device.
(17)
The control device according to any one of (12) to (16), wherein the control unit determines the operation level of the communication device based on the position information of the communication device to be operated as the master.
(18)
An acquisition unit that acquires information about the side link communication from a communication device that operates as a master for controlling side link communication with another device.
A control unit that executes processing related to the side link communication based on the information acquired by the acquisition unit, and
A communication device.
(19)
The communication device according to (18), wherein the control unit executes a process for discovering a communication device that operates as the master prior to acquiring information regarding the side link communication.
(20)
The communication device according to (18) or (19), wherein the control unit executes the side link communication using the information shared from the communication device.
(21)
The communication device according to any one of (18) to (20), wherein the control unit executes the side link communication based on the information constrained by the communication device.
(22)
The communication device according to (21), wherein the control unit executes the side link communication based on parameters related to the side link communication constrained by the communication device.
(23)
The communication device according to any one of (18) to (20), wherein the control unit executes the side link communication based on the information controlled by the communication device.
(24)
The communication device according to (23), wherein the control unit executes the side link communication based on a schedule of resources for the side link communication controlled by the communication device.
(25)
From the base station device, the first communication device that operates as a master for controlling side link communication between other devices, and
A second communication device that operates as a slave whose side link communication is controlled from the first communication device, and
With
The first communication device is
An acquisition unit that acquires information for operating as the master from the base station device, and
A control unit that executes a process for operating as the master based on the information acquired by the acquisition unit, and a control unit.
With
The second communication device is
An acquisition unit that acquires information related to the side link communication from the first communication device that operates as the master.
A control unit that executes processing related to the side link communication based on the information acquired by the acquisition unit, and
A communication system.

1 System 100 Base station 110 Antenna unit 120 Wireless communication unit 130 Network communication unit 140 Storage unit 150 Control unit 151 Communication control unit 153 Information acquisition unit 155 Notification unit 200 Terminal device 210 Antenna unit 220 Wireless communication unit 230 Storage unit 240 Control unit 241 Communication control unit 243 Information acquisition unit 247 Notification unit

Claims (20)

An acquisition unit that acquires information for operating as a master for controlling side-link communication between other devices from a base station device, and an acquisition unit.
A control unit that executes a process for operating as the master based on the information acquired by the acquisition unit, and a control unit.
A communication device. The communication device according to claim 1, wherein the acquisition unit acquires information for operating as one of a plurality of operation levels as the operation level of the master. The operation level of the master is a first level that collects information for side link communication and shares it with the other device, a second level that restricts the operation of the side link communication of the other device, and the operation level of the other device. The communication device according to claim 2, wherein the communication device has at least a third level of controlling the operation of side link communication. The communication device according to claim 3, wherein when operating at the first level, the control unit shares information on the usage status of resources used in side link communication with the other device. The communication device according to claim 3, wherein when operating at the first level, the control unit executes sensing of information shared with the other device. The communication device according to claim 3, wherein when operating at the second level, the control unit constrains parameters related to side link communication with respect to the other device. The communication device according to claim 6, wherein when operating at the second level, the control unit provides information for constraining the sensing region to the other device. The communication device according to claim 3, wherein when operating at the third level, the control unit controls parameters related to side link communication with respect to the other device. The communication device according to claim 8, wherein when operating at the third level, the control unit executes a resource schedule for side link communication with respect to the other device. A control unit that sets information for the communication device to operate as a master for controlling side-link communication between other devices.
A communication unit that transmits information set by the control unit to the communication device in order to operate the communication device as the master.
A control device. The control device according to claim 10, wherein the communication unit transmits information for operating as one of a plurality of operation levels as the operation level of the master. The operation level of the master is a first level that collects information for side link communication and shares it with the other device, a second level that restricts the operation of the side link communication of the other device, and the operation level of the other device. The control device according to claim 11, which has at least a third level of controlling the operation of sidelink communication. The control device according to claim 11, wherein the control unit sets an operation that can be executed by the master for each operation level. The control device according to claim 11, wherein the communication unit transmits at least the operation level to the communication device if the communication device to be operated as the master is within the coverage. The control device according to claim 11, wherein the communication unit transmits information for operating as any operation level at the timing when the communication device is connected to the own device. The control device according to claim 11, wherein the control unit determines the operation level of the communication device based on the position information of the communication device to be operated as the master. An acquisition unit that acquires information about the side link communication from a communication device that operates as a master for controlling side link communication with another device.
A control unit that executes processing related to the side link communication based on the information acquired by the acquisition unit, and
A communication device. The communication device according to claim 17, wherein the control unit executes a process for discovering a communication device that operates as the master prior to acquiring information regarding the side link communication. The communication device according to claim 17, wherein the control unit executes the side link communication using the information shared from the communication device. The communication device according to claim 17, wherein the control unit executes the side link communication based on the information constrained by the communication device.

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